1 files changed, 1 insertions, 0 deletions
diff --git a/file.c b/file.c
index 4484493390..2109ca9cb8 100644
--- a/file.c
+++ b/file.c
@@ -28,6 +28,7 @@
 #include "ruby/util.h"
 #include "ruby/thread.h"
 #include "dln.h"
+#include "encindex.h"
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>